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CaBr2 + Cs2S 💧→ CaS↓ + 2CsBr

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Reaction of calcium bromide and caesium sulfide
CaBr2Calcium bromide + Cs2SCaesium sulfide
💧
⟶
CaS↓Calcium sulfide + 2CsBrCaesium bromide

The reaction of calcium bromide and caesium sulfide yields calcium sulfide and caesium bromide. This reaction is an acid-base reaction and is classified as follows:

Table of contents
  1. 1Reaction data
  2. 2Thermodynamic changes
  3. 3References
  4. 4Related categories

Reaction data

Chemical equation

Reaction of calcium bromide and caesium sulfide
CaBr2Calcium bromide + Cs2SCaesium sulfide
💧
⟶
CaS↓Calcium sulfide + 2CsBrCaesium bromide

General equation

Precipitation reaction
Miscible with water/Very soluble in water/Soluble in waterLewis acid + Miscible with water/Very soluble in water/Soluble in waterLewis base
💧
⟶
Insoluble in water/Very slightly soluble in water/Slightly soluble in waterLewis conjugate + Product(Non-redox product)

Oxidation state of each atom

Reaction of calcium bromide and caesium sulfide

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
CaBr2Calcium bromide1
Lewis acid
Very soluble in water
Cs2SCaesium sulfide1
Lewis base
Very soluble in water

Products

Chemical formulaNameCoefficientTypeType in general
equation
CaSCalcium sulfide1
Lewis conjugate
Slightly soluble in water
CsBrCaesium bromide2
Non-redox product
–

Thermodynamic changes

Changes in standard condition

Reaction of calcium bromide and caesium sulfide
CaBr2Crystalline solid + Cs2SCrystalline solid
💧
⟶
CaS↓Crystalline solid + 2CsBrCrystalline solid
Standard enthalpy
of reaction
ΔrH°
kJ · mol−1		Standard
Gibbs energy
of reaction
ΔrG°
kJ · mol−1		Standard entropy
of reaction
ΔrS°
J · K−1 · mol−1		Standard heat
capacity of reaction
at constant pressure
ΔrCp°
J · K−1 · mol−1
per 1 mol of
Equation
−251.4–––
per 1 mol of
−251.4–––
per 1 mol of
−251.4–––
per 1 mol of
−251.4–––
per 1 mol of
−125.7–––

Changes in aqueous solution

Reaction of calcium bromide and caesium sulfide
◆
ΔrG−9.6 kJ/mol
K4.81 × 101
pK−1.68
CaBr2Ionized aqueous solution + Cs2SIonized aqueous solution
💧
⟶
CaS↓Crystalline solid + 2CsBrIonized aqueous solution
Standard enthalpy
of reaction
ΔrH°
kJ · mol−1		Standard
Gibbs energy
of reaction
ΔrG°
kJ · mol−1		Standard entropy
of reaction
ΔrS°
J · K−1 · mol−1		Standard heat
capacity of reaction
at constant pressure
ΔrCp°
J · K−1 · mol−1
per 1 mol of
Equation
27.6−9.6124.3–
per 1 mol of
27.6−9.6124.3–
per 1 mol of
27.6−9.6124.3–
per 1 mol of
27.6−9.6124.3–
per 1 mol of
13.8−4.862.15–

Thermodynamic data of reactants

Chemical formulaStandard enthalpy
of formation
ΔfH°
kJ · mol−1		Standard Gibbs
energy of
formation
ΔfG°
kJ · mol−1		Standard
molar entropy
S°
J · K−1 · mol−1		Standard molar
heat capacity at
constant pressure
Cp°
J · K−1 · mol−1
CaBr2 (cr)-682.8[1]-663.6[1]130[1]–
CaBr2 (g)-398.3[1]–––
CaBr2 (ai)-785.92[1]-761.49[1]111.7[1]–
CaBr2 (cr)
6 hydrate
-2506.2[1]-2152.8[1]410[1]–
Cs2S (cr)-359.8[1]–––
Cs2S (ai)-483.7[1]-498.3[1]251.5[1]–
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution

Thermodynamic data of products

Chemical formulaStandard enthalpy
of formation
ΔfH°
kJ · mol−1		Standard Gibbs
energy of
formation
ΔfG°
kJ · mol−1		Standard
molar entropy
S°
J · K−1 · mol−1		Standard molar
heat capacity at
constant pressure
Cp°
J · K−1 · mol−1
CaS (cr)-482.4[1]-477.4[1]56.5[1]47.40[1]
CaS (g)––––
CsBr (cr)-405.81[1]-391.41[1]113.05[1]52.93[1]
CsBr (g)-209.2[1]-241.0[1]267.43[1]37.07[1]
CsBr (ai)-379.82[1]-395.97[1]215.48[1]–
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution

References

List of references

  1. 1
    Janiel J. Reed (1989)
    The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI Units
    National Institute of Standards and Technology (NIST)